Bosch LS1-UC10U, Installation Notes

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10 en | Wiring LS1 Pendant Sphere Loudspeaker
2018.06 | V.01 | F.01U.354.322 Installation note Bosch Security Systems B.V.
4 Wiring
It is recommended to hang the speaker before making the wire connections.
Wiring method which shall be in accordance with:
1.
In Canada, CSA C22.1, Canadian Electrical Code, Part I Safety Standard for Electrical
Installations, Section 32;
2. In the United States, the National Electrical Code, NFPA 70, and the National Fire Alarm
and Signaling Code, NFPA72;
Maximum recommended wiring length (0.5 dB loss)
100 Watt 40 Watt 10 Watt
18 AWG 230 ft 560 ft 2300 ft
16 AWG 360 ft 900 ft 3600 ft
14 AWG 560 ft 1400 ft 5600 ft
12 AWG 910 ft 2300 ft 9100 ft
See also
– Installation, page 11
4.1 Ceramic block connector
Connect the speaker using the ceramic block connector.
+
0
From Amplifier
To Speaker
Figure 4.1: Ceramic block connector
4.2 Transformer Taps
Carefully observe the wire colors to make sure you are connecting the desired transformer tap
to the amplifier (+) terminal, and connect the red speaker wire to the amplifier (-) terminal.
Transformer wire-tap options:
Figure 4.2: Circuit diagram